– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 am Fri 19 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 am Fri 19 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 9 am Fri 19 Dec Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryHeavy rain (total 48mm) on Sat afternoon. Becoming colder with heavy fall of snow, heaviest during Sun afternoon. Temperatures will be slightly above freezing (max 3°C on Sun morning, min 1°C on Fri morning). Wind will be generally light. | Days 4–6 Weather SummaryModerate rain (total 13mm), heaviest on Mon afternoon giving way to a moderate fall of snow, heaviest on Wed afternoon. Freeze-thaw conditions (max 3°C on Tue night, min 0°C on Wed night). Wind will be generally light. | |||||||||||||||||
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  |  | | | | | | | |  | |  |  | |
light snow | light snow | mod. snow | light rain | heavy rain | heavy rain | mod. rain | light snow | mod. snow | light snow | mod. rain | mod. snow | light rain | light snow | light rain | light rain | mod. snow | some clouds | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
5 | 3 | 7 | — | — | — | — | 5 | 9 | 3 | — | 8 | — | 1 | — | — | 7 | — | |
— | — | — | 3 | 14 | 17 | 6 | 8 | — | — | 8 | — | 0.1 | 0.6 | 0.5 | 4 | — | — | |
max°C | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 2 | 2 |
min°C | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 1 | 2 | 2 | 2 | 3 | 1 | 0 |
-2 | -2 | -2 | -2 | -1 | -1 | -2 | 0 | -3 | -2 | -3 | -2 | -1 | -1 | 0 | 1 | -2 | -2 | |
700 | 700 | 650 | 750 | 900 | 900 | 950 | 850 | 800 | 750 | 850 | 750 | 750 | 850 | 1400 | 1000 | 850 | 600 | |
Cloud base (m) | 600 | 550 | 550 | 550 | 550 | 550 | 550 | 550 | 550 | 550 | 550 | 550 | 600 | 600 | 1700 | 600 | 500 | 550 |
 | 7:56 | — | — | 7:56 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — |
 | — | 4:13 | — | — | 4:13 | — | — | 4:14 | — | — | 4:14 | — | — | 4:15 | — | — | 4:15 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Heavy rain (total 48mm) on Sat afternoon. Becoming colder with heavy fall of snow, heaviest during Sun afternoon. Temperatures will be slightly above freezing (max 3°C on Sun morning, min 1°C on Fri morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Moderate rain (total 13mm), heaviest on Mon afternoon giving way to a moderate fall of snow, heaviest on Wed afternoon. Freeze-thaw conditions (max 3°C on Tue night, min 0°C on Wed night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.